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DormanPart #: 749-166
Dorman 749-166 Window Regulator - Front Left
⚙️ 60 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$128.99Free Shipping
🚚Free ShippingNo Cost to Continental U.S.
🔄Free Returns*Wrong fit? No cost
🛡️60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
🔥
✅ In Stock · Ready To Ship
Most orders ship same-day if ordered before 1pm CST.
✅OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Lexus, LS460, LS600h, IS F, IS250, IS350, GS350, GS450h, GS460, GS430, and GS300
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST
Not what you need? Click here for all Window Regulator options
Reliable Window Regulator for Lexus GS and IS Models
The Dorman 749-166 window regulator is designed to restore smooth electric window operation in select Lexus vehicles. Engineered with durable materials, this power window regulator is compatible with multiple Lexus GS and IS models, providing a dependable replacement part for your vehicle's door assembly.
Key Features of the Dorman 749-166 Window Regulator
- Gear material constructed from plastic for consistent performance
- Bolt-on attachment type for secure and straightforward installation
- Metal and plastic frame materials for balanced strength and weight
- Electric window operation type, compatible with power window systems
- Includes one power regulator unit; motor and mounting hardware not included
Detailed Product Description
This Dorman window regulator (part number 749-166) is specifically designed for electric window systems in Lexus GS300, GS350, GS430, GS450h, GS460, IS250, IS350, IS F, LS460, and LS600h models. The regulator features a plastic gear that meshes smoothly within the mechanism, supported by a frame constructed from both metal and plastic components to ensure durability while maintaining a lightweight design. The bolt-on attachment type allows for a secure fit within the door assembly, although mounting hardware and motor are not included with this part. Installation instructions are not provided, so professional installation or prior experience is recommended.
Common Issues Addressed by This Window Regulator
- Electric window failing to move up or down smoothly
- Window stuck in one position due to regulator gear wear
- Unusual noises during window operation caused by worn components
- Window misalignment or uneven movement within the door frame
- Complete failure of the window regulator mechanism
Installation Notes and Tips
- Ensure compatibility with your Lexus model before installation
- Since mounting hardware and motor are not included, retain original components or source separately
- Carefully remove the door panel to access the window regulator assembly
- Use appropriate tools for bolt-on attachment to avoid damage
- Test window operation before reassembling the door panel
Quality Assurance and Warranty Information
Dorman parts are manufactured to meet or exceed OEM standards for fit and function. While this window regulator does not include a motor or mounting hardware, it is built to provide reliable service when installed correctly. Please consult the product packaging or Dorman's official resources for specific warranty details related to part number 749-166.
| Brand | Dorman |
| Part Number | 749-166 |
| Attachment Type | Bolt On |
| Frame Material | Metal |
| Frame Material | Plastic |
| Installation Instructions Included | No |
| Motor Included | No |
| Mounting Hardware Included | No |
| Package Contents | 1 Power Regulator |
| Thread Direction | Plastic |
| Window Operation Type | Electric |
| Wire Quantity | 0 |
This part fits 60 vehicles. Search below:
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2017 | Lexus | LS460 | Front Left | Fits power window regulation in various vehicle models. |
| 2016 | Lexus | LS460 | Front Left | Fits power window regulation in various vehicle models. |
| 2016 | Lexus | LS600h | Front Left | Fits power window regulation in various vehicle models. |
| 2015 | Lexus | LS460 | Front Left | Fits power window regulation in various vehicle models. |
| 2015 | Lexus | LS600h | Front Left | Fits power window regulation in various vehicle models. |
| 2014 | Lexus | IS F | Front Left | Fits power window regulation in various vehicle models. |
| 2014 | Lexus | LS460 | Front Left | Fits power window regulation in various vehicle models. |
| 2014 | Lexus | LS600h | Front Left | Fits power window regulation in various vehicle models. |
| 2013 | Lexus | IS F | Front Left | Fits power window regulation in various vehicle models. |
| 2013 | Lexus | IS250 | Front Left | Fits power window regulation in various vehicle models. |
| 2013 | Lexus | IS350 | Front Left | Fits power window regulation in various vehicle models. |
| 2013 | Lexus | LS460 | Front Left | Fits power window regulation in various vehicle models. |
| 2013 | Lexus | LS600h | Front Left | Fits power window regulation in various vehicle models. |
| 2012 | Lexus | IS F | Front Left | Fits power window regulation in various vehicle models. |
| 2012 | Lexus | IS250 | Front Left | Fits power window regulation in various vehicle models. |
| 2012 | Lexus | IS350 | Front Left | Fits power window regulation in various vehicle models. |
| 2012 | Lexus | LS460 | Front Left | Fits power window regulation in various vehicle models. |
| 2012 | Lexus | LS600h | Front Left | Fits power window regulation in various vehicle models. |
| 2011 | Lexus | GS350 | Front Left | Fits power window regulation in various vehicle models. |
| 2011 | Lexus | GS450h | Front Left | Fits power window regulation in various vehicle models. |
| 2011 | Lexus | GS460 | Front Left | Fits power window regulation in various vehicle models. |
| 2011 | Lexus | IS F | Front Left | Fits power window regulation in various vehicle models. |
| 2011 | Lexus | IS250 | Front Left | Fits power window regulation in various vehicle models. |
| 2011 | Lexus | IS350 | Front Left | Fits power window regulation in various vehicle models. |
| 2011 | Lexus | LS460 | Front Left | Fits power window regulation in various vehicle models. |
| 2011 | Lexus | LS600h | Front Left | Fits power window regulation in various vehicle models. |
| 2010 | Lexus | GS350 | Front Left | Fits power window regulation in various vehicle models. |
| 2010 | Lexus | GS450h | Front Left | Fits power window regulation in various vehicle models. |
| 2010 | Lexus | GS460 | Front Left | Fits power window regulation in various vehicle models. |
| 2010 | Lexus | IS F | Front Left | Fits power window regulation in various vehicle models. |
| 2010 | Lexus | IS250 | Front Left | Fits power window regulation in various vehicle models. |
| 2010 | Lexus | IS350 | Front Left | Fits power window regulation in various vehicle models. |
| 2010 | Lexus | LS460 | Front Left | Fits power window regulation in various vehicle models. |
| 2010 | Lexus | LS600h | Front Left | Fits power window regulation in various vehicle models. |
| 2009 | Lexus | GS350 | Front Left | Fits power window regulation in various vehicle models. |
| 2009 | Lexus | GS450h | Front Left | Fits power window regulation in various vehicle models. |
| 2009 | Lexus | GS460 | Front Left | Fits power window regulation in various vehicle models. |
| 2009 | Lexus | IS F | Front Left | Fits power window regulation in various vehicle models. |
| 2009 | Lexus | IS250 | Front Left | Fits power window regulation in various vehicle models. |
| 2009 | Lexus | IS350 | Front Left | Fits power window regulation in various vehicle models. |
| 2009 | Lexus | LS460 | Front Left | Fits power window regulation in various vehicle models. |
| 2009 | Lexus | LS600h | Front Left | Fits power window regulation in various vehicle models. |
| 2008 | Lexus | GS350 | Front Left | Fits power window regulation in various vehicle models. |
| 2008 | Lexus | GS450h | Front Left | Fits power window regulation in various vehicle models. |
| 2008 | Lexus | GS460 | Front Left | Fits power window regulation in various vehicle models. |
| 2008 | Lexus | IS F | Front Left | Fits power window regulation in various vehicle models. |
| 2008 | Lexus | IS250 | Front Left | Fits power window regulation in various vehicle models. |
| 2008 | Lexus | IS350 | Front Left | Fits power window regulation in various vehicle models. |
| 2008 | Lexus | LS460 | Front Left | Fits power window regulation in various vehicle models. |
| 2008 | Lexus | LS600h | Front Left | Fits power window regulation in various vehicle models. |
| 2007 | Lexus | GS350 | Front Left | Fits power window regulation in various vehicle models. |
| 2007 | Lexus | GS430 | Front Left | Fits power window regulation in various vehicle models. |
| 2007 | Lexus | GS450h | Front Left | Fits power window regulation in various vehicle models. |
| 2007 | Lexus | IS250 | Front Left | Fits power window regulation in various vehicle models. |
| 2007 | Lexus | IS350 | Front Left | Fits power window regulation in various vehicle models. |
| 2007 | Lexus | LS460 | Front Left | Fits power window regulation in various vehicle models. |
| 2006 | Lexus | GS300 | Front Left | Fits power window regulation in various vehicle models. |
| 2006 | Lexus | GS430 | Front Left | Fits power window regulation in various vehicle models. |
| 2006 | Lexus | IS250 | Front Left | Fits power window regulation in various vehicle models. |
| 2006 | Lexus | IS350 | Front Left | Fits power window regulation in various vehicle models. |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
11R5716980230260814828210209aWLR1256
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.